/***
 * Copyright 2002-2010 jamod development team
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * Original implementation by jamod development team.
 * This file modified by Charles Hache <chache@brood.ca>
 ***/

package net.wimpi.modbus.cmd;

import net.wimpi.modbus.ModbusCoupler;
import net.wimpi.modbus.Modbus;
import net.wimpi.modbus.io.ModbusSerialTransaction;
import net.wimpi.modbus.msg.ReadInputDiscretesRequest;
import net.wimpi.modbus.msg.ReadInputDiscretesResponse;
import net.wimpi.modbus.net.SerialConnection;
import net.wimpi.modbus.util.SerialParameters;
import net.wimpi.modbus.util.BitVector;

/**
 * Class that implements a simple commandline tool for reading an analog input.
 * 
 * @author Dieter Wimberger
 * @version @version@ (@date@)
 */
public class SerialDITest {

	public static void main(String[] args) {

		SerialConnection con = null;
		ModbusSerialTransaction trans = null;
		ReadInputDiscretesRequest req = null;
		ReadInputDiscretesResponse res = null;

		String portname = null;
		int unitid = 0;
		int ref = 0;
		int count = 0;
		int repeat = 1;

		try {

			// 1. Setup the parameters
			if (args.length < 4) {
				printUsage();
				System.exit(1);
			} else {
				try {
					portname = args[0];
					unitid = Integer.parseInt(args[1]);
					ref = Integer.parseInt(args[2]);
					count = Integer.parseInt(args[3]);
					if (args.length == 5) {
						repeat = Integer.parseInt(args[4]);
					}
				} catch (Exception ex) {
					ex.printStackTrace();
					printUsage();
					System.exit(1);
				}
			}

			// 2. Set slave identifier for master response parsing
			ModbusCoupler.getReference().setUnitID(unitid);

			System.out.println("net.wimpi.modbus.debug set to: "
					+ System.getProperty("net.wimpi.modbus.debug"));

			// 3. Setup serial parameters
			SerialParameters params = new SerialParameters();
			params.setPortName(portname);
			params.setBaudRate(115200);
			params.setDatabits(7);
			params.setParity("None");
			params.setStopbits(2);
			// params.setEncoding("rtu");
			// params.setEcho(true);
			if (Modbus.debug)
				System.out.println("Encoding [" + params.getEncoding() + "]");

			// 4. Open the connection
			con = new SerialConnection(params);
			con.open();

			// 5. Prepare a request
			req = new ReadInputDiscretesRequest(ref, count);
			req.setUnitID(unitid);
			req.setHeadless();
			if (Modbus.debug)
				System.out.println("Request: " + req.getHexMessage());

			// 6. Prepare the transaction
			trans = new ModbusSerialTransaction(con);
			trans.setRequest(req);

			// 7. Execute the transaction repeat times
			int k = 0;
			do {
				trans.execute();

				res = (ReadInputDiscretesResponse) trans.getResponse();
				if (Modbus.debug)
					System.out.println("Response: " + res.getHexMessage());
				BitVector inputs = res.getDiscretes();
				for (int i = 0; i < count; i++) {
					System.out.println("Bit " + i + " = " + inputs.getBit(i));
				}

				k++;
			} while (k < repeat);

			// 8. Close the connection
			con.close();

		} catch (Exception ex) {
			ex.printStackTrace();
			// Close the connection
			con.close();
		}
	}// main

	private static void printUsage() {
		System.out
				.println("java net.wimpi.modbus.cmd.SerialAITest <portname [String]>  <Unit Address [int8]> <register [int16]> <wordcount [int16]> {<repeat [int]>}");
	}// printUsage

}// class SerialAITest
